1 /*

     2  * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 package sun.jvm.hotspot.asm.x86;

    26 

    27 import sun.jvm.hotspot.asm.*;

    28 

    29 public class X86ShiftInstruction extends X86Instruction implements ShiftInstruction {

    30    final private int operation;

    31    final private Operand operand1;

    32    final private ImmediateOrRegister operand2;

    33 

    34    public X86ShiftInstruction(String name, int operation, Operand operand1, ImmediateOrRegister operand2, int size, int prefixes) {

    35       super(name, size, prefixes);

    36       this.operand1 = operand1;

    37       this.operand2 = operand2;

    38       this.operation = operation;

    39    }

    40 

    41    public String asString(long currentPc, SymbolFinder symFinder) {

    42       StringBuffer buf = new StringBuffer();

    43       buf.append(getPrefixString());

    44       buf.append(getName());

    45       buf.append(spaces);

    46       buf.append(getOperandAsString(operand1));

    47 

    48       if(operand2 != null) {

    49          buf.append(comma);

    50 

    51          if ((operand2 instanceof Register)) {

    52             buf.append(operand2.toString());

    53          }

    54          else {

    55             Number number = ((Immediate)operand2).getNumber();

    56             buf.append("0x");

    57             buf.append(Integer.toHexString(number.intValue()));

    58          }

    59       }

    60       return buf.toString();

    61    }

    62 

    63    public int getOperation() {

    64       return operation;

    65    }

    66 

    67    public Operand getShiftDestination() {

    68       return operand1;

    69    }

    70 

    71    public Operand getShiftLength() {

    72       return operand2;

    73    }

    74 

    75    public Operand getShiftSource() {

    76       return operand1;

    77    }

    78 

    79    public boolean isShift() {

    80       return true;

    81    }

    82 

    83    protected String getOperand2String() {

    84       return operand2.toString();

    85    }

    86 }